Brontok.kx not detected, what else?

I recently purchased ESET Smart Security for my network including the package for Lotus Domino. The above mentioned virus comes through the mail and is detected by Trend and AVG Free but does not even get noticed by any of my up to date ESET products despite the fact I have submitted the file twice...

Please compress the suspicious files with WinRAR, protect the archive with the password "infected" and send it to samples[at]eset.com with the thread's url from Wilders' in the subject. We'll need to analyse it to confirm or deny that it's corrupt.